Links can be styled to look like buttons.
First make a link, by selecting text and clicking the Link button in the toolbar. More about making links.
Then place your cursor in the link text or highlight the link. Because you have selected a link, the Styles dropdown will activate.
Open the Styles dropdown and choose a button style.
There are six styles to choose from.
You can edit or remove the link as you normally would.
To change a button style, select the link and choose a new style from the Styles dropdown.
To remove the button style, select the link and click on the current button style to de-select it.